Interactive Brokers API

• IB
  
• API and sample code
• API Reference
  
• Yahoo Group TWSAPI
• IB Forum
• TWSStart
• TWSLink (middleware, API abstraction layer)
• ATS sample architecture
• TREE data server (real-time data capture)
• IB demo site
• Data feed quality
  
• Excel
• Beginner Guide
  
• Wiki: TWS API ** TWS DDE
• IB-Excel adapter
• ExcelDNA
  
• exceltrader.blogspot.com
  
• tradewright.com
  
• Python
• IbPy
• SciPy
• iTrade
• ProfitPy (includes IB data collector)
• TA-Lib
  
• C#
• WinForms trading program (Ms-PL)
  
• IB C# API library
  
• Live data tutorial
• Tradelink ATS (open-source)
• TickZoom (backtesting)
  
• NMath
  
• Java
• API quick reference
• Historical data via API
• Class architecture
• JSystemTrader
  
• JOpenComponents
• Perl
• GeniusTrader
• Finance::InteractiveBrokers::TWS
• C++
• trading-shim
  
• R
• IBrokers
• Quantmod